Welcome to the Office 2010 Primary Interop Assembly Reference

The Office 2010 Primary Interop Assembly (PIA) Reference provides help for developing managed applications for Office. It extends the Office 2010 Developer Reference from the COM environment to the managed environment and focuses on how to use the PIA.

If you use Microsoft Visual Studio 2008 Tools for the 2007 Microsoft Office System or Office development tools in Visual Studio 2010 and you are connected to the Internet, you can access context-sensitive help when you press F1 in the Visual Studio Integrated Development Environment (IDE). This help content is the Office 2010 PIA Reference on MSDN.